what weather?
There are several very good books on weather by Alan Watts, one I remember "Crosswind Rules". They are generally for the temperate regions, but are informative.
Passage weather seems pretty good (I've made 3 1500 mile passages & sailed 2 winters in the Caribbean using his info), but they become less accurate after 4-5 days & also seem to be about 12 hours off on weather changes; still about the best I've found.
If you really want accurate weather, get a weather fax & learn to read the various products.
a friend suggested
http://www.windguru.cz/int/, which gives VERY accurate real time winds for some of the remotest places, but also the Caribbean.
As a professional captain, I always said, "If I was as good at my job as the weather people are at theirs, I'd have sunk this boat twice already, today." Wouldn't it be grand if one had a job where one gets paid to be wrong most of the time, with no consequences?
Good Luck.